Supergirl cast: Who stars with Milly Alcock in the DCU film?
Your essential guide to the cast of Supergirl.
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- Patrick Cremona
Published: Thursday, 25 June 2026 at 9:57 am
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Supergirl flies onto the big screen this week – with Cruella and I, Tonya director Craig Gillespie helming the second instalment in James Gunn's rebooted DC Universe after Superman last summer.
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Adapted from Tom King and Bilquis Evely's acclaimed comic Supergirl: Woman of Tomorrow, the film follows a harder-edged, world-weary Kara Zor-El on a cosmic revenge mission across the galaxy, with House of the Dragon and Sirens star Milly Alcock taking on the main role.
It's Alcock's first full outing as Supergirl – after she made a cameo at the end of Superman – while David Corenswet will briefly reprise his role as Clark Kent and Jason Momoa steps into the part of bounty hunter Lobo having previously played Aquaman in the previous incarnation of the DC Universe.
But who else stars in the film? Read on for a guide to the actors appearing in the film and the characters they play.
Supergirl cast: Who stars with Milly Alcock in the DCU film?
- Milly Alcock as Kara Zor-El / Supergirl
- David Corenswet as Kal-El / Superman
- Jason Momoa as Lobo
- Matthias Schoenaerts as Krem of the Yellow Hills
- Eve Ridley as Ruthye Marye Knoll
- David Krumholtz as Zor-El
- Emily Beecham as Alura In-Ze
- Ferdinand Kingsley as Elias Knoll
- Diarmaid Murtagh as Drom Baxton
Milly Alcock as Kara Zor-El / Supergirl
Milly Alcock as Supergirl. Warner Bros
Who is Kara Zor-El / Supergirl? Superman's younger cousin, who was raised on a chunk of the destroyed planet Krypton and watched everyone around her die – meaning she's a little more jaded than her cousin. The film finds her on a galaxy-spanning quest for vengeance.
What else has Milly Alcock been in: After first appearing in a number of Australian TV shows including Upright and The Gloaming, Alcock broke through as the young Rhaenyra Targaryen in HBO's House of the Dragon and has since had a main role alongside Julianne Moore and Meghann Fahy in Netflix series Sirens.
Eve Ridley as Ruthye Marye Knoll
Eve Ridley as Ruthye Marye Knoll in Supergirl. Warner Bros
Who is Ruthye Marye Knoll? A young alien girl who enlists Supergirl's help to avenge her father's murder.
What else has Eve Ridley been in: Supergirl marks the most major role to date for Ridley, but she has previously been seen in episodes of Casualty, 3 Body Problem and The Witcher.
Matthias Schoenaerts as Krem of the Yellow Hills
Milly Alcock as Supergirl and Matthias Schoenaerts as Krem of the Yellow Hills in Supergirl. WB
Who is Krem of the Yellow Hills? The film's central villain, Krem is the leader of the Brigands, a group of space pirates and human traffickers.
What else has Matthias Schoenaerts been in: The Belgian actor is known for films including Rust and Bone, Far from the Madding Crowd and The Danish Girl, while more recent credits include TV roles in The Regime and Django (in which he played the lead).
David Krumholtz as Zor-El
David Krumholtz as Zor-El in Supergirl WB
Who is Zor-El? Supergirl's father, who makes his living as a scientist on the Kryptonian city of Argo.
What else has David Krumholtz been in: Krumholtz has had a huge variety of roles since the '90s, including The Santa Clause franchise, 10 Things I Hate About You, the Harold & Kumar films, the CBS drama Numb3rs and more recently Oppenheimer and Springsteen: Deliver Me from Nowhere.
Emily Beecham as Alura In-Ze
Emily Beecham as Alura In-Ze in Supergirl WB
Who is Alura In-Ze? Supergirl's mother.
What else has Emily Beecham been in: Beecham won best actress at Cannes for Little Joe and has appeared in TV shows such as 1899, Into the Badlands, King & Conqueror and The Pursuit of Love. Other big-screen roles include Coen Brothers flick Hail Caesar, British indie Daphne and Disney origin story Cruella.
David Corenswet as Kal-El / Superman
David Corenswet in Superman. DC/ YouTube.
Who is Kal-El / Superman? Supergirl's cousin – who lives a double life on Earth as Daily Planet journalist Clark Kent and the superhero nicknamed the Man of Steel – will need no introduction.
What else has David Corenswet been in: Corenswet led 2025's Superman as the new DCU Clark Kent, and is known for roles in Ryan Murphy's Netflix shows The Politician and Hollywood, as well as horror film Pearl – the middle chapter in Ti West's X trilogy.
Jason Momoa as Lobo
Jason Momoa as Lobo in Supergirl. WB
Who is Lobo? An alien mercenary and bounty hunter from the utopian planet Czarnia, who crosses paths with Supergirl on her travels.
What else has Jason Momoa been in: Notably, Momoa previously played Aquaman in the earlier incarnation of the DC Universe, while he is also known for his roles as Khal Drogo in Game of Thrones, Duncan Idaho in Dune, Dante Reyes in Fast X and Garrett "The Garbage Man" Garrison in A Minecraft Movie. He also led the cast of the Apple TV+ dystopian drama series See.
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Supergirl is out now in UK cinemas.
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Authors
Patrick CremonaSenior Film Writer
Patrick Cremona is the Senior Film Writer at Radio Times, and looks after all the latest film releases both in cinemas and on streaming. He has been with the website since October 2019, and in that time has interviewed a host of big name stars and reviewed a diverse range of movies.
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